Lath board and method of making the same



Feb. 81.921.

s. M. FORD Lum vom: Ann METHOD oF MAKING' Tm; `smi:

Filed Nov., 27. A192.2y l

Hrrae/rcr i5 proofing material.

Patented F eb. 8, 1927.

lFORD, Y1D.EClllASElD, ASSIGNR 'lO CLARA FORD.

BOARD-AND METHOD O-F MTA-KIN G ,'llHEfSLAlVIE.

Application filed November 27, 1922. Serial No. 603,655.

One object of my invention isvtoprovide a lath board formed of paper orother suitable material 4corrugated into dove-tailed shape plaits, thematerial of which is impregnated ,5 from both sides With aWater-proofing.com-

.of the class described having reinforcing wires therein `Which arecoated with a Water- Another object is to provide in a lath board of theiclassvdgescribed, vhaving reinforcing Wires therein, means 'for making.a substantially yrigid rconnection between Lthe wires and .materialcomposingthe lathboard.

Another object isto ,previde a ,method `for making a .lath board of theclass .described vith the central `portion lthereof havinghighinsulating qualities and ,all exposed Iportions ithereof Water-proofedVlilith these and incidental objects in View, the invention consists ofcertain novel featurcs of construction and combinations of parts, theessential elements of which are 3U hereinafter described With referenceto the drawing which accompanies and forms a part of this specification.

ln the drawing, Figure l is a perspective view of a lath boardembodying` my invention; Figure 2 is an enlarged fragmentary detail ofthe same, showing the outer surf faces of the sheet impregnated and theinner portion unimpregnated with a water-proofing compound and lfig. 3is an enlarged sec-V fi) tion taken longitudinally through one of thereinforcing Wires. t

A s shown in the drawing, the lath board consists of a sheet of paper,felt or of other suitable material preferably corrugated into asubstantially dove-tailed formation with lath like faces l on one sidethereof and intermediate depressions 2 between the lath like faces andsupporting faces 3 0n the other side of the lath board, the latter facesbeing narrower than the lath like faces as described in my co-pendingapplication of even date, entitled, Lath board.

Reinforcing fiat Wire or ribbons t are threaded thru the Webs 5connect-ing the lath like faces and the supporting faces as dei scribednsaid application aforesaidand also in various patents heretofore' issuedto me.

lt vwill :be noted that Where the reinforcing Wires lpierce the Webs,there is an vaccumulation of the Water-proofing compound 6 (Fig) whichflows up around the Wire forminga vheavy lirm ,fillet which not onlycementsthe Wire vfirmly to the web but also stiflens and reinforces .theWire in its connection with ythe web soV the same stiffness of completedboard can be obtained with 'fa' thin Wire cemented -in this .manner thatcould be obtained :by a much thicker vvire that merely'piercedthe Webivithoutvhaving a iill'etrbuilt up aroundltheaperture.

,In the past it 'has .been common yin the manufact-ure of ylath board of,this class ,to use a'fsheet of material which` has been impregnatedWith a bituminous compound such as asphalt .andvto corrugate thematerial so impregnated into the desiredshape.

l/Vhere-the lathboard has been reinforced ,with -,metal, it has beencustomary to [use Wire or ribbon .uncoated and hence subject tordeterioration .if lleft exposed to the Weather.

It is also Well known that paper or felt which has high heat insulatingqualities loses a great dealof its heat insulating qualities Whenimpregnated With Waterproofing or fire resisting compound.

Inasmuch as the heat insulating qualities on any material of this classdepends upon the amount of air trapped in and held by the fibers 0f thematerial between the outer surfaces thereof, it is evident that if thesheet is impregnated with the Waterproof-A ing compound, this air Willpractically all be expelled from the sheet and heat can be more readilytransferred through the Waterproofing substance ivhich completely fillsthe sheet than through the dead air spaces in the unimpregnated sheet. n

It is also evident that steel Wire Will rust when exposed to moistureand that instorage, shipment and ordinary usage, the reinforcing -WireWill be subject t0 exposure and consequently to deterioration.

In my present invention, ll prefer to form an unimpregna-ted sheet ofmaterial into a dove-tailed shape, thread reinforcing Wires through theWebs and then dip the entire board With its reinforcing Wireinto aWater-proofing compound.

The board is left inthe compound suf- `both sides of ivhich'are formedof the samer. .material but impregnatedwith Waterprooff ing compound. vY Y In other words, the completed board is "very much' the same as YifVit Was made voi two sheets of impregnatedmaterial With a v sheet ofuniinpregnat'edV material therebetween butivith the fibers'oit all threesheets Vintimately joinedV together. Moreover the yreinforcing Wires areentirely covered With Water-prooiing Y. material and are closelyj'cemented `to the Webs Where they pass throughand any holes orimperfections in Y' the sheet Which might have crept in duringthe'process ofmanufacture will be filled bynthe dipping operation. n

While IhaveV described my invention and illustrated it in one particularstyle and method, I do not wish yit-understood ythat l limit myself tothis particular embodiment as it isv evident the invention may be variedin 'many Ways Within the scope` of the fol'- lowing claims: y Y* l. Aklath board comprising a'sheet of j suitable material yhaving thejouter`'surfaces thereof ycoated'with a Water-prooing com-y pound and' the'inner portion thereof unf impregnated with'y said compound, said sheetYbeing formedv intoa substantially dove-tailed shaped formation` having-Yoppositely dis-V Y posed lath like faces With intermediate de@pressions therebetween and Webs connecting said lfaces andy a `pluralityof Vreini'oreing Wires threaded through said `Webs 'between saidfacesfsaidwires,being covered With' aV Waterproofing compound. s Y n 2.The method of making lath board comprising the corrugating of a sheet ofsuitable material of high insulatingkqualities into the Y desiredshape,vv passing reinforcing Wires through said material parallel to theouter' faces of the completed board, thendipping said reinforcing lsheetfinto Water-prooiing compound sufliiciently longv to coat the Wires andouter surfaces' of they sheet Wit-h said compound and cement Vthemtogether, but leaving a `substantial portion of the g sheet between' theIaces unimpregnated'with said 'Y compound.

3. ln a lathboa'rd,V thecombination otra Y sheet of'corrugated material,a reinforcing Wire threadingsaid material andY fillets of a dippingcompound surrounding said wire Where it pierces said niaterial.V Y

4. A lathboard comprising the combination with a sheet of suitablematerial formed into 'substantially dove-tailed shaped corrugationshaving oppositely disposed lath- Vlike facesA withvconnect-ingWebstherebetween7 `of a pluralityi'of reinforcing Wirespiercing said Webs;VV and fillets of van adhesive materialconnectingsaid Wires to said Webs Where said Webs are pierced byV saidWires.Y

., SILAS M. FGRD.V

